Gas-lamp.



No. 736,287. PATE NTED'AUG, 11, 1903..;

' W. G. MIDG'LEY.

GAS LAMP. APPLICATION mm JUNE 9. 1902.

NO MODEL.

SHEETS-SHEET 1.

Witnesses. Inventor WMM w s/ 6 g V 4 v I M THE uoams PETERS co. Pumauwo.v WASHINGTON, o. c.

PATENTED AUG. 11, 1903.

w. e. MIDGLEY.

GAS LAMP, APPLICATION-731L313 JUNE 9, 1902.

H6 MODEL.

2 SHEETS-SHEET 2.

Inventor. I

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UNITED STATES Patented August 11, 1903.

= PATENT OFFICE.

GAS-LAMP.

SPECIFICATION forming part of Letters Patent N 0. 736,287, dated August 11, 1903.

Application filed June 9, 1902.

To atZZ whom iti nay concern: i Be it known that I, WILLIAM G. MIDGLEY,

' a subject of the Kingof Great Britain, residing at Buffalo, in the county of Erie and State of New York, have inventedcertain new and useful Improvementsin Gas-Lamps, of which the following. is a specification.

This invention relates to an improved in- I candescen't gas-lamp which has a tubular pivot, so as to have both pivotal and longi-.

tudinal movement to detachably secure the inclosing case in position.

The invention also relates to certain details of construction; r

The principal objects of the invention are to superheat the gas before it reaches the burners, to secure more thorough and complete combustion, and thereby increase the brilliancy of the illumination, and to make provision for easilydismounting and assembling the globe and and repairing. i c

All of the abovewill be fully and clearly hereinafter described andclaimed,reference its support forcleaning being had to the accompanying drawings, in

which a preferred adaptation of the invention is shown.

Figure 1 is a side elevation of the improved lamp. Fig. 2 is a central vertical section through the lamp, the loop being shown in full elevation. Fig. 3 is a detached enlarged view of the inclosing case. Fig. 4 is an enlarged fragmentary section through the opposed heat-deflectors. Fig. 5 is an enlarged fragmentary section illustrating the manner of attaching the shade-supporting ring to the cylinder. Fig.- 6 is an enlarged. section through one of the membersof the loop and $erial No. 110,747. (No model.)

i a fragment of the cylinder, showing the manner of fastening the cylinder to the loop. Fig. 7 is a detached top plan view of the bottom plate of the inclosing case and the needle valve construction. Fig. 8'is an enlarged detached central vertical section through the burners and the bottom plate. enlarged fragmentary section through. the lower. loop connection, also showing fragments of the lower vertical.gas-conducting tube, the pilot-light tube, and the lowerends of the members ofthe loop: Fig. 10 is an enlarged fragmentary View of oneof'the radial connecting-tubes. Fig. 11 is an enlargedidetached viewof the valve-needle. Fig.1?! is an enlarged detached view of the mixingchamber cylinder. Fig. 13 is an enlarged detached top plan view of the perforated top plate of the burner. Fig. 14 is an enlarged detached top plan viewof theBunsen tube with the top ring, the perforated top, and the mixing-chamber cylinder removed. Fig. 15 is an enlarged detached view of one of the springs of the needle-valve' Fig. 16 is an enlarged fragmentary section cutting vertically through'the lower portion of the lamp and illustrating the manner of fastening the inclosing case in place, the slotted fasteningpiece being shown in locking position in full lines and in unlocked position in dotted lines. Fig. 17 is an enlarged detached viewof the slotted fastening-piece. Fig. 18 is avertical central section through one of. the hlurners. Fig. 19 is a detached top viewxof the gauze. In referring to the drawings in detail like numerals designate like parts. i

The frame of the lamp hasa loop which is composed of two side members 1 and 2 and top and bottom connections 3 and 4 for said members. to a gas-pipe 5, and the bottom connection is in the form of a double T. A pilot-light tube '6 extends vertically up from the top vertical portion of the double T, and a central gasconducting tube 7 extends vertically down from'the bottom vertical portion 'of the double T. The gas-conducting tube 7 has an enlargement 8, which is provided with aplurality of radial side openings 9, (see Fig. 16,) and a like plurality of horizontal connecting tubes 10 are screwed or otherwise secured in the side openings. The opening through each Fig. 9 is an The top connection3 is connected 7 .13 and has a central valve-opening 15.

of the horizontal tubes extend longitudinally outward to near its outerend, as shown at 11 in Fig. 8, and then vertically upward, as at 12, through an upper vertical extension 13. A nozzle 14 is secured on each extensiolri Bunsen tube 16 is screwed or otherwise secured over each nozzle, which is formed in a peculiar way, being provided with two separate and distinct series of openings for the entrance of air. (See Fig. 18.) One of these series of openings is near the lower end of the bunsen and is designated by the numeral 17, and another series, numbered 18, is formed vertically above the lower series in an intermediate portion of the bunsen. To prevent the escape of gas through the upper series and at the same time aid in mixing the gas and air, a funnel-shaped or truncated coneshaped tube 19 is fitted in the bunsen with its lower or enlarged end between the upper and lower series of air-openings and its upper or contracted end above the upper series of openings, so that the gas spurts from the nozzle past the lower series of openings into the funnel and issues into the Bunsen tube above the upper series, thereby creating a suction which draws the air in through both series. In this manner more air and less gas is used, the air and gas are more thoroughly mingled, and better and more complete combustion is obtained. The upper portion of the Bunsen tube gradully tapers or enlarges, as shown at 20 in Fig. 18, to form the lower portion of an enlarged mixing-chamber, and a shell or cylinder 21 is screwed upon the upper end of the Bunsen tube and constitutes the surrounding wall of the upper portion of the mixing-chamber. A top ring 22 is screwed upon the shell 21, and a perforated top 23 is secured in place by said ring. When the burner is used with gas of low pressure, such as illuminating or manufactured gas, in some places a second or lower perforated part or gauze 24 is secured in place between the top extreme of the bunsen and the shell and serves to prevent the flame jumping down through the Bunsen tube to the nozzle. This lower gauze is not necessary with natural gas or under moderately high pressure.

In the construction shown in Fig. 2 the burners are supported below the loop with their upper portion extending above the lower end of the loop, thereby bringing the burners in proximity to the lower extreme of the loop and superheating the gas before it passes into the burners. The greater portion of the loopthat is, the middle and upper portionisinclosedin acylinder25,whieh titscloselyaround it and is fastened thereto byslitting portions 26 therefrom-and bending them around the loop members, as shown in Fig. 6. Two opposed heat-deflectors are arranged at the upper end of the cylinder 25. The upper deflector 27 is in the form of an inverted dish with an ornamental edge or border and is secured above the upper end of the loop. (See Fig. 2.) The lower deflector 28 is of similar form, but is arranged oppositely to the upper deflector and is separated sufficiently therefrom to leave space for the escape of the products of combustion, as shown at 29 in Fig. 2. The two deflectors are connected together by metal strips 30, secured to each other by rivets 31 or the like, as shown in Fig. 4.

Mantles 32 are supported above each burner by supports 33, and these mantles are inclosed within a globe 34, which encircles the lower portion of the loop below the cylinder 25. The globe is provided at the top with a supporting and strengthening ring 35 and rests upon and is supported at the bottom in the upper portion of an inclosing case. inclosing case consists of a cylinder 36, provided with a series of side perforations orairinlets 37, which is fastened to the globe, and a substantially circular horizontal disk 38, which is secured below the burners to a bottom vertical rod 39, which is preferably formed integral with the gas-conducting tube 7 and extending vertically down therefrom. The disk 38 isheld in place by a nut 40, screwed on the rod 39 beneath the disk, as shown in Fig. 8. The lower end of the rod 39 is slotted vertically to form a fork or bi- The furcation 41, and an approximately rectangular-shaped piece 42, provided with a longitudinally-elongated opening or slot 43 and rounded ends, is secured between the forks by a horizontal pin 44, substantially as shown in Fig. 16, so that it can have both a longitudinal and a pivotal movement. inder 36 has a cross-bar 45 extending across the bottom, which is provided with a central hub 46, (see Fig. 3,) through the vertical opening47 of which the rod 39 is adapted to pass. (See Fig. 16.) Thehub is grooved out on the bottom at opposite sides of the vertical opening, as shown at 48 in Fig. 3, to afford a seat for the slotted fastening-piece when in its horizontal locking position. The vertical opening 47 is of sufficient size to permit the passage therethrough of the slotted fastening-piece when in the vertical position (shown in dotted lines in Fig. 16) to allow the removal of the cylinder 36 and globe. The slot in the fastening-piece is preferably enlarged at approximately the middle to form a seat for the pin when the fastening-piece is in its horizontal locking position, as shown at 49 in Figs. 16 and 17.

The flow of gas is controlled by a valve device 50, which is opened and closed by a rockarm 51. The arm 51 is operated by wires or chains 52, which are fastened at their upper ends to the arm and pass through openings 53 in the disk 38. (See Fig. 7.) The wires or chains hang beneath the lamp within convenient reach. The volume of gas passing through the pilot-light tube is regulated or controlled by a screw-valve 54. (See Figs. 1 and 2.)

The central valve-opening 15 in each of the The cyling centrally through the vertical openings 12, andare tapered or sharpened at their upper extremities 57 to fit into the opening 15. (See Fig. 8.) The threads on the needles are held in constant contact with the threads of I the opening through which it passes by spiral springs 58, which encirclelowerportions of the needles of the disk 38 and enlarged head 56. (See Fig. 8.) This serves to close any intervening space between the opposed screw-threads, and thus prevents the escape the middle of the cylinder 25.

located above the globe and serves to reflect of gas.

Ashade 59, formed, preferably, as shown in Figs. 1 and 2, is supported by an ornamental ring 60, which is fastened to approximately This shade is the light downward. One of the principal advantages of this improved lamp are the use of a shorter loop with a vertical tube beneath and the supporting of the burners by this tube below the loop and partially within an inclosing case, thereby enabling the use of a smaller and neater globe and hiding the larger portion of the burner, permitting the use of a smaller and lighter loop and the supporting of the burners from a single tube. This combines the best features of the loop construction and the single-tube construction in the same device.

. I claim as my invention- 1. In a gas-lamp, a gas-conducting loop, a

plurality of burners supported below the loop,

of burners secured to said horizontal tube,

mantle-supports above the burners, mantles on saidsupports, a globe inclosing the man- .tle's and a case partially inclosing the burnersupon the top of which the substantially as set forth.

3. Ina gas-lamp, a globe, a support for the globe having an opening, a rod adapted to exglobe rests,

tend through the opening, and a longitudinally-slotted fastening-piece having pivotal support from the rod and adapted to be moved longitudinally on said pivot.

.4. In a gas-lamp, a globe, a support for the globe having an opening, a rod adapted to extend through the opening and having a forked lower end, a pin extending between the forks anda fastening-piece having a longitudinal slot through which the pin passes, said fastoning-piece being adapted to have both pivotal and longitudinal movement on the pin and said slot being enlarged at approximately the middle to form a seat for the pin, substantially as set forth.

5. In a gas-lamp, a tubular loop, av'ertical tube extending downward from the lower extreme of the loop, a plurality of horizontal tubes extending radially from said vertical tube, a series of burners having attachment to said horizontal tubes, a disk beneath the burners, a perforated cylinder surrounding said burners, mantle supports extending above the burners, mantles on said supports and a globe mounted in the perforated cylinder and inclosing the mantles.

6. In a gas-lamp, a vertical gas-conducting tube, a series of burners having support from and gas connection to said tube, a cylinder inclosing the burners and having a cross-bar provided with an opening, a vertical bar extending down from the tube and adapted to pass through the opening in the cross-bar, and a longitudinally-slotted approximately rectangular-shaped fasteningpiece having pivotal support from the vertical bar and adapted to be moved longitudinally and also turned from one position to another, substantially as set forth.

7. In a gas-burner, a cylindrical Bunsen tube of integral construction having an upper and lower series of air-inlets in its surface, and a funnel in said Bunsen tube with its lower end above the lower series audits upper end above the upper series, substantially as set forth.

8. In a gas-burner, a cylindrical Biunsen tube having an upper and lower series of airinlets, and a funnel-shaped or tapering tube in said Bunsen tube having its larger or lower end secured to the Bunsen tube above the lower series of air-inlets and its upper end extending above the upper series of openings.

9. In a gas-lamp, a gas-conducting loop, a tube extending downward from said loop, a plurality of burners supported by said tube below said loop,mantles having supportabove 'the burners, a globe inclosing the mantels and a case partially inclosing the burners, substantially as set forth.

10. In a gas-lamp, a gas-conducting loop, a single tube extending downward from said loop and a-plurality of burners supported by said single tube below the loop, substantially as set forth.

11. In a gas-lamp, a gas-conducting loop, a single tube extending downward from said loop, a case inclosing said tube, a globe above said case and a plurality of burners having support from the tube with their lower portions within the inclosing case and their up per portions within the globe.

WILLIAM G. MIDGL'EY.

Witnesses:

L-M- SANGSTER, GEO. A. NEUBAUER.

ICO 

